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Full Record for Micrograph 269

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Micrograph no
269
Brief description
Fe, C 0.6 (wt%) steel, hard drawn
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, drawing Link to MATTER Glossary entry for drawing, iron, metal, steel Link to MATTER Glossary entry for steel
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 0.6 (wt%)
Standard codes
Reaction
Processing
hard drawn
Applications
Sample preparation
Nital
Technique
Reflected light microscopy
Length bar
400 μm
Further information
Hard drawing is an operation done to a metal in order to increase its strength. The operation causes dislocation motion in the metal and sufficient work causes the creation of extra dislocations through the operation Frank-Read sources. These dislocations "lock" together, making yield of the material more difficult, hence increasing its strength. This process also causes the metal to be more brittle. The act of drawing causes deformation of the grains in the direction of drawing as seen in this sample.
Contributor
Dr R F Cochrane
Organisation
Department of Materials, University of Leeds
Date
04/09/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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